Waterproofing Specialists for Concrete Slabs and Roofs

Our team provides comprehensive consultations, walking you through our membrane system and tailoring a waterproofing plan that meets the unique needs of your project.

injectable WATERPROOFING solutions

The Benefits of
Our Membrane Waterproofing Solution

The Benefits of Our Membrane & SNSeal Waterproofing System

Long-Lasting Protection – Our advanced membranes are designed to withstand extreme weather, heavy loads, and structural movement, while SNSeal injectable technology reinforces from within, stopping water at its source. Together, they provide durability that outperforms traditional systems.

Structural Reinforcement – SNSeal doesn’t just block water — it strengthens surrounding concrete by filling cracks, joints, and porous areas, reducing the risk of concrete cancer and extending the lifespan of the slab or roof.

Non-Invasive Application – Unlike excavation or large-scale repairs, our approach minimises disruption. The system is installed efficiently, saving time and avoiding costly downtime.

Comprehensive Protection – The combination of membrane and injectable waterproofing delivers a complete barrier. Surface membranes keep out external moisture, while SNSeal seals hidden pathways deep inside the structure.

Proven Versatility – Effective across a wide range of applications, from concrete slabs and rooftops to basements, podiums, planters, and lift pits, ensuring consistent results in all environments.

Cost Savings Over Time – By preventing leaks, structural deterioration, and recurring repairs, our system reduces long-term maintenance costs and protects the value of your Commercial or Industrial property.

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after

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The Problem: Concrete Cancer & Water Ingress

We started inside the top-floor apartment, where the tenant had reported persistent mould. A closer look at the ceiling revealed several fine cracks, which are clear signs that water had been making its way in from above. These weren’t just surface blemishes; they were active pathways for moisture, feeding mould growth and creating an unhealthy living environment.

From there, we moved up to the rooftop to trace the source. As we removed the perimeter flashings, the real issue became clear, concrete cancer was silently spreading beneath. The reinforcing steel (reo bar) embedded in the concrete had begun to corrode, expanding and causing the concrete to crack and break away. Left untreated, this kind of damage can seriously compromise a building’s structural integrity. It was clear we needed to act fast to stop further deterioration and restore proper waterproofing protection.

Protect Your Property – Get a Free Quote for SNSeal Injectable Waterproofing

The Problem & Solution: Protecting Concrete Slabs & Roofs

The Causes: How Water Ingress Begins

Concrete slabs and roofs endure constant stress from harsh weather, UV exposure, structural movement, and natural wear. Small cracks, porous surfaces, and poorly detailed joints provide easy entry points for moisture. Failed or aging membranes, combined with inadequate drainage, make the problem worse, allowing water to creep deeper into the structure.

The Risks: Why Water Ingress is Dangerous

Once water penetrates a slab or roof, it begins to compromise the structure from within. Moisture attacks the reinforcing steel, causing it to corrode and expand. This expansion cracks and weakens the surrounding concrete, a process commonly known as concrete cancer. At the same time, water intrusion encourages mould and dampness, which threaten both building integrity and occupant health.

The Consequences: What Happens if Left Untreated

When water ingress is ignored, small vulnerabilities quickly escalate into major failures. Cracks widen, concrete spalls, and leaks spread into interior spaces, damaging finishes, electrical systems, and valuable assets. Structural stability can be severely compromised, repair costs skyrocket, and property value declines. What may start as a minor seepage soon becomes a critical issue demanding large-scale remediation.

The Solution: Stopping Water at Its Source

Protecting slabs and roofs requires more than temporary surface coatings. Effective waterproofing means addressing the problem from both the outside and the inside. Advanced membrane systems provide a durable barrier on the surface, while our patented SNSeal injectable technology penetrates deep into cracks and porous areas to create a permanent seal within the structure. This dual approach prevents future water ingress, strengthens the concrete, and ensures long-lasting protection against concrete cancer.

Why SNSeal is Superior

Unlike foams or poly products that break down over time, SNSeal creates a permanent watertight barrier from within the concrete itself. It not only blocks active leaks but also reinforces the surrounding structure, extending its lifespan and reducing the need for costly repairs. When combined with our membrane systems, SNSeal delivers complete waterproofing protection for slabs and roofs, keeping Commercial and Industrial buildings strong, safe, and watertight for decades.

Common Application Areas that require waterproofing

SNSeal performs exceptionally well across a wide range of structural elements:

Basement Waterproofing

Protecting Industrial and commercial basements with advanced solutions that stop active leaks during or after excavation—ensuring long-lasting structural protection and a dry, healthy environment."

Lift Pits & Elevator Shafts
Prevent water intrusion in these often challenging-to-reach areas.

Podiums, Planters & Rooftops
Ideal for sealing rooftop structures and planters prone to water leaks.

Foundation Concrete Slabs
Waterproof these surfaces to fend off moisture infiltration and prevent water damage.

Construction Joints
Treat expansion joints that can be vulnerable to water ingress over time.

Underground Structures
Secure tunnels and subway stations where water ingress poses unique challenges.

Secant Piles
Seal against groundwater seepage to protect foundational integrity.

Car Parks & Ramps
Waterproof car park slabs and ramps to protect against water damage.

Retaining Wall Waterproofing
Treating cracked or leaking concrete and block retaining walls with non-invasive sealant systems.

FAQS

Have Questions

We’ve heard it all. Here’s everything you need to know before working with us.

Do you have water pooling on the ground?

Are there stains on your walls?

Do you have mould or peeling paint?

Are there rust stains?

If you answered yes to any of these questions then chances are you have a leak and its time to call Stop and Seal!

I have utilised the services of Stop & Seal on several occasions and have found them to be reliable, professional, and most of all, come with a can-do attitude.

The SNSeal product is unique in its application, but most importantly it works, and I’ve seen great results when no one else was willing to attempt to solve an issue. I have great pleasure in recommending their services.

Wayne Syrch
Site Manager, Hutchinson Builders

We have been caretakers of Tweed Ultima Apartments for around 2+ years, At this time we have engaged Stop and Seal to do water leak rectification on 6 or more problem areas around the property.

Each leak has been assessed and whilst Stop and Seal have needed to attend to the same problem area more than once, the important thing is they have kept coming back out. All but 1 of our 6 issues have been resolved and some of these leaks have been issues over 12 years that no one else could fix. I highly recommend Stop and Seal their innovative rubber and activator and most of all their commitment to getting the job done.

Brett Cooper
Director, Tweed Ultima Apartments

Robbie and the team at Stop and Seal are at the top of the game.

They solved a water problem in our unit block that we had been dealing with forever. Now when it rains we aren’t nervous.

Craig Nickson

I have never seen a waterproofing solution work so well.

I wouldn’t hesitate to recommend Stop and Seal to anyone with water problems.

Phillip Jones

We have tried many options to try and stop the leaking in our basement carpark.

The boys from Stop and Seal rolled in and in a few day managed to fix a water problem we had been fighting for years.

Daniel Morgan
Hutchinson Builder

OUR CLIENTS

CLIENTS WHO
TRUST US

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